Toyota Forklift 7HBW23 4,500 lb. Powered Pallet Walkie Service Manual SN 24501 and up - PD DOWNLOAD

Page 31

Section 3. Systems Overview

Toyota Model 7HBW23 Service Manual

Theory of Operation (when travel is requested), Arm Angle B switch (S25) closes and enables slow speed travel. When the control handle is placed beyond 46° from the full upright position, Arm Angle A switch (S24) also closes, enabling fast speed travel. When the control handle is placed in the bottom 8° of its operating range, Arm Angle B switch opens, activating the parking brake.

Travel Request, Forks Trailing

the ETAC verifies that switch S25 (Arm Angle B) is engaged for slow speed mode

the ETAC verifies that both switch S24 (Arm Angle A) and switch S25 (Arm Angle B) are engaged for fast speed mode.

the voltage at M– of the drive motor will vary from 24V to 1V. The voltage is proportional to the position of the thumb controls.

the drive wheel starts to rotate in reverse direction at a speed proportional to the voltage at M–.

When the thumb controls are rotated in the forward direction (tractor-first) from neutral: •

a forward travel signal is detected via hall effect sensors, converted into a travel instruction in the ETAC (See “Electronic Tiller Arm Card (ETAC)” on page 3-7.) and transmitted via the Controller Area network (CAN) to the power amplifier. the ETAC verifies that the emergency reverse button is not activated before supplying the travel command to the power amplifier.

the ETAC verifies that switch S25 (Arm Angle B) is engaged for slow speed mode.

the ETAC verifies that both switch S24 (Arm Angle A) and switch S25 (Arm Angle B) are engaged for fast speed mode.

the voltage at M– of the drive motor will vary from 24V to 1V. The voltage is proportional to the position of the thumb controls.

the drive wheel starts to rotate in forward direction at a speed proportional to the voltage at M–.

Emergency Reverse If the emergency reverse button (belly button) is closed with the control handle lowered in travel mode, the control system provides an immediate, rapid acceleration in the reverse (forks-first) direction. The following occurs: •

the emergency reverse signal is converted into a reverse travel instruction and transmitted via the CAN-bus to the power amplifier.

travel and speed inputs are ignored.

the power amplifier provides maximum torque immediately after the emergency reverse button is activated.

maximum reverse travel continues until the emergency reverse button is released.

Travel Request, Forks-First When the thumb controls are rotated in the reverse direction (forks-first) from neutral: •

reverse travel signal is detected via hall effect sensors, converted into a travel. instruction in the ETAC, and transmitted via the CAN-bus to the power amplifier.

the ETAC verifies that the emergency reverse button is not activated before supplying the travel command to the power amplifier.

3-6

00700-CL340-05, Issued: 2 May 2005


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Section 6. Component ProceduresToyota Model 7HBW23 Service Manual Motors, General

16min
pages 124-127, 129-139, 142

Electromagnetic Brake

6min
pages 117-123

Section 6. Component ProceduresToyota

1min
page 116

Section 6. Component ProceduresToyota

5min
pages 110-115

Section 6. Component ProceduresToyota Model 7HBW23 Service Manual Switches (General)

2min
pages 108-109

Toyota Model 7HBW23 Service ManualSection 6. Component Procedures Control Handle

6min
pages 99-105, 107

Toyota Model 7HBW23 Service ManualSection 6. Component Procedures

2min
pages 95-98

Section 6. Component ProceduresToyota

1min
pages 92-94

Section 6. Component Procedures

6min
pages 85, 87-91

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
pages 81-83

Symptom Tables: Travel (Forward/Reverse) System

1min
page 80

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
page 79

Toyota Model 7HBW23 Service ManualSection 5. Troubleshooting

1min
page 78

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
page 77

Symptom Tables: Lift/Lower System

1min
page 76

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

5min
pages 65-68

Toyota Model 7HBW23 Service ManualSection 5. Troubleshooting

1min
page 60

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

2min
page 59

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
pages 57-58

Toyota Model 7HBW23 Service ManualSection 5. Troubleshooting

1min
page 56

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
page 55

Toyota Model 7HBW23 Service ManualSection 5. Troubleshooting

1min
page 52

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
page 51

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

5min
pages 47-50

Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

1min
pages 45-46

How to Use This Chapter

2min
pages 43-44

Section 4. Planned MaintenanceToyota Model 7HBW23 Service Manual Maintenance Guidelines

1min
pages 38-39

Toyota Model 7HBW23 Service ManualSection 4. Planned Maintenance Maintenance Guidelines

1min
page 37

Section 4. Planned Maintenance

1min
page 36

Section 3. Systems OverviewToyota Model 7HBW23 Service Manual

2min
pages 31-32

Section 3. Systems OverviewToyota Model

2min
pages 27-30

Static Safety

1min
page 24

Section 2. Safety

5min
pages 14-23

Toyota Model 7HBW23 Service ManualSection 1. How To Use This Manual Manual Design Manual Design

1min
page 8
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